body {
    background: #0d0f14; /* Deep Tech Navy */
    color: #e0e0e0;
    font-family: 'Montserrat', sans-serif;
    text-align: center;
    padding: 40px 20px;
    margin: 0;
}

h1 {
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: #00eaff;
    margin-bottom: 50px;
    text-shadow: 0 0 15px rgba(0, 234, 255, 0.4);
}

.card-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
    margin-bottom: 40px;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 234, 255, 0.1);
    padding: 25px;
    width: 210px;
    border-radius: 16px;
    font-size: 14px;
    font-weight: 300;
    letter-spacing: 1px; /* Pro Tip: Cleaner spacing */
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: all 0.3s ease;
}

.card:hover {
    border-color: #00eaff;
    transform: translateY(-5px);
}

.card span {
    display: block;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-top: 12px;
    letter-spacing: 0px; /* Values don't need wide spacing */
}

#led {
    width: 40px;
    height: 40px;
    background: #444;
    border-radius: 50%;
    margin: 0 auto 10px;
    transition: background 0.5s ease, box-shadow 0.5s ease;
}

.indicator-box {
    background: rgba(26, 29, 35, 0.8);
    display: inline-block;
    padding: 20px 50px;
    border-radius: 50px;
    margin: 30px 0;
    border: 1px solid #333;
}

#capState {
    margin: 0;
    font-weight: 400;
    font-size: 14px;
    letter-spacing: 1px;
}

.chart-section {
    margin: 60px auto;
    max-width: 900px;
}

h2 {
    font-weight: 300;
    font-size: 18px;
    color: #00eaff;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

canvas {
    margin-top: 30px;
    width: 80%;
    max-width: 700px;
    height: 300px;
}
canvas {
    width: 90% !important;
    height: 300px !important;
    display: block;
    margin: 20px auto;
    background: rgba(10, 10, 10, 0.5);
    border-radius: 20px;
    box-shadow: 0 0 20px #00eaff33;
    padding: 20px;
    border: 1px solid #222;
}

footer {
    text-align: center;
    margin-top: 10px;
    padding: 6px 0;
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: 6px;
}

footer a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
}

footer a:hover {
    text-decoration: underline;
    color: #fff9f9;
}

footer i {
    color: #ffffff;
}